VONA
What is VONA?

VONA stands for Volcano Observatory Notice for Aviation. It issues reports for changes, both increases and decreases, in volcanic activities, providing a description on the nature of the unrest or eruption, potential or current hazards as well as likely outcomes. See the following link (USGS) for further details. The Center for Volcanology and Geological Hazard Mitigation (CVGHM) under the Geological Agency of the Indonesian Ministry of Energy and Mineral Resources produced VONA's reports based on analysis of data from the agency's monitoring networks as well as from direct observations. VONA's alert levels are color-coded to indicate the different types of notifications addressing specific informative needs. The reports are disseminated via email to national and international stakeholders in the aviation sector. Other interested parties can avail of them through email subscription. All notifications are publicly available online.

USGS
 

6th of January 2021, 10 months ago

2021-01-06 00:29:00 UTC Orange

Dukono - 20210106/0029Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 10 months ago

Eruption with volcanic ash cloud at 2326 UTC (0826 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..

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1st of January 2021, 11 months ago

2021-01-01 22:27:00 UTC Orange

Dukono - 20210101/2227Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 10 months ago

Eruption with volcanic ash cloud at 2219 UTC (0719 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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29th of December 2020, 11 months ago

2020-12-29 09:26:00 UTC Orange

Dukono - 20201229/0926Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 0916 UTC (1816 local). Best estimate of ash-cloud top is around 16147 FT (4893 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast.

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25th of December 2020, 11 months ago

2020-12-25 08:00:00 UTC Orange

Dukono - 20201225/0800Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 0744 UTC (1644 local). Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north..

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11th of December 2020, 11 months ago

2020-12-11 23:29:00 UTC Orange

Dukono - 20201211/2329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 2237 UTC (0737 local). Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest.

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2020-12-11 00:04:00 UTC Orange

Dukono - 20201211/0004Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 2147 UTC (0647 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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10th of December 2020, 11 months ago

2020-12-10 01:49:00 UTC Orange

Dukono - 20201210/0149Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 2236 UTC (0736 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north..

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2020-12-10 01:49:00 UTC Orange

Dukono - 20201210/0149Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 2236 UTC (0736 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north..

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8th of December 2020, 11 months ago

2020-12-08 01:56:00 UTC Orange

Dukono - 20201208/0156Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 11 months ago

Eruption with volcanic ash cloud at 2133 UTC (0633 local). Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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27th of November 2020, 1 year ago

2020-11-27 23:45:00 UTC Orange

Dukono - 20201127/2345Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2336 UTC (0836 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

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25th of November 2020, 1 year ago

2020-11-25 03:32:00 UTC Orange

Dukono - 20201125/0332Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2222 UTC (0722 local). Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

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22nd of November 2020, 1 year ago

2020-11-22 22:59:00 UTC Orange

Dukono - 20201122/2259Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2146 UTC (0646 local). Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest.

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19th of November 2020, 1 year ago

2020-11-19 23:25:00 UTC Orange

Dukono - 20201119/2325Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2214 UTC (0714 local). Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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13th of November 2020, 1 year ago

2020-11-13 01:24:00 UTC Orange

Dukono - 20201113/0124Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2303 UTC (0803 local). Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..

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11th of November 2020, 1 year ago

2020-11-11 23:00:00 UTC Orange

Dukono - 20201111/2300Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2133 UTC (0633 local). Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. -cloud moving to south..

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VONA Color Code

Volcano is in normal, non-eruptive state, or, after a change from a higher level: Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.


Volcano is experiencing signs of elevated unrest above known background levels, or, after a change from higher level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.


Volcano is exhibiting heightened unrest with increased likelihood of eruption with column height below 6000 meter above sea level.


Eruption is forecast to be imminent with significant emission of ash with column height above 6000 meter above sea level.